/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:58:27,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:58:27,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:58:28,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:58:28,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:58:28,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:58:28,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:58:28,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:58:28,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:58:28,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:58:28,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:58:28,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:58:28,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:58:28,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:58:28,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:58:28,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:58:28,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:58:28,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:58:28,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:58:28,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:58:28,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:58:28,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:58:28,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:58:28,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:58:28,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:58:28,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:58:28,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:58:28,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:58:28,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:58:28,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:58:28,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:58:28,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:58:28,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:58:28,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:58:28,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:58:28,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:58:28,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:58:28,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:58:28,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:58:28,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:58:28,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:58:28,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:58:28,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:58:28,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:58:28,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:58:28,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:58:28,210 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:58:28,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:58:28,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:58:28,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:58:28,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:58:28,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:58:28,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:58:28,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:58:28,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:58:28,213 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:58:28,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:58:28,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:58:28,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:58:28,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:58:28,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:58:28,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:58:28,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:58:28,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:58:28,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:58:28,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:58:28,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:58:28,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:58:28,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:58:28,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:58:28,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:58:28,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:58:28,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:58:28,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0110c020e/20a919755b0f4e5dbcbb79352d1cd5ef/FLAGd5e83fd3e [2020-10-28 18:58:29,589 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:58:29,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:58:29,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0110c020e/20a919755b0f4e5dbcbb79352d1cd5ef/FLAGd5e83fd3e [2020-10-28 18:58:29,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0110c020e/20a919755b0f4e5dbcbb79352d1cd5ef [2020-10-28 18:58:29,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:58:29,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:58:29,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:29,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:58:29,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:58:29,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:29" (1/1) ... [2020-10-28 18:58:29,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a52b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:29, skipping insertion in model container [2020-10-28 18:58:29,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:29" (1/1) ... [2020-10-28 18:58:29,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:58:29,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:58:30,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:30,328 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:58:30,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:30,487 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:58:30,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30 WrapperNode [2020-10-28 18:58:30,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:30,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:58:30,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:58:30,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:58:30,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... [2020-10-28 18:58:30,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:58:30,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:58:30,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:58:30,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:58:30,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:58:30,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:58:30,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:58:30,667 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:58:30,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:58:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:58:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:58:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:58:30,668 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:58:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:58:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:58:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:58:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:58:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:58:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:58:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:58:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:58:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:58:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:58:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:58:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:58:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:58:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:58:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:58:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:58:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:58:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:58:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:58:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:58:31,770 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:58:31,771 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:58:31,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:31 BoogieIcfgContainer [2020-10-28 18:58:31,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:58:31,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:58:31,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:58:31,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:58:31,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:58:29" (1/3) ... [2020-10-28 18:58:31,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526d8970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:31, skipping insertion in model container [2020-10-28 18:58:31,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:30" (2/3) ... [2020-10-28 18:58:31,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526d8970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:31, skipping insertion in model container [2020-10-28 18:58:31,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:31" (3/3) ... [2020-10-28 18:58:31,783 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 18:58:31,795 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:58:31,805 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:58:31,820 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:58:31,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:58:31,868 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:58:31,868 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:58:31,868 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:58:31,868 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:58:31,868 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:58:31,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:58:31,869 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:58:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states. [2020-10-28 18:58:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:58:31,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:31,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:31,916 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1986643699, now seen corresponding path program 1 times [2020-10-28 18:58:31,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:31,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722824875] [2020-10-28 18:58:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:32,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:32,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:32,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:35,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:35,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:58:35,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:58:35,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3416 [2020-10-28 18:58:35,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:35,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:35,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 18:58:35,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:58:35,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:58:36,027 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:58:36,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:36,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:36,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:36,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:36,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:58:36,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:36,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:36,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:36,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:36,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722824875] [2020-10-28 18:58:36,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:36,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90662825] [2020-10-28 18:58:36,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:36,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:36,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:36,116 INFO L87 Difference]: Start difference. First operand 180 states. Second operand 4 states. [2020-10-28 18:58:36,392 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:58:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:37,297 INFO L93 Difference]: Finished difference Result 359 states and 584 transitions. [2020-10-28 18:58:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:37,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:58:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:37,313 INFO L225 Difference]: With dead ends: 359 [2020-10-28 18:58:37,313 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 18:58:37,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 18:58:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2020-10-28 18:58:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 18:58:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 392 transitions. [2020-10-28 18:58:37,399 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 392 transitions. Word has length 69 [2020-10-28 18:58:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:37,400 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 392 transitions. [2020-10-28 18:58:37,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 392 transitions. [2020-10-28 18:58:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:58:37,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:37,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:37,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:58:37,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash -913594550, now seen corresponding path program 1 times [2020-10-28 18:58:37,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:37,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598223463] [2020-10-28 18:58:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:37,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:38,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:58:38,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:58:38,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-28 18:58:38,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:38,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:38,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:58:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 18:58:38,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:58:38,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:58:38,766 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:58:38,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:38,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:38,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:38,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:38,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:58:38,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:38,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:38,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:38,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:38,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598223463] [2020-10-28 18:58:38,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:38,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:58:38,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596123483] [2020-10-28 18:58:38,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:58:38,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:58:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:38,820 INFO L87 Difference]: Start difference. First operand 264 states and 392 transitions. Second operand 5 states. [2020-10-28 18:58:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:39,643 INFO L93 Difference]: Finished difference Result 402 states and 607 transitions. [2020-10-28 18:58:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:58:39,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 18:58:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:39,650 INFO L225 Difference]: With dead ends: 402 [2020-10-28 18:58:39,650 INFO L226 Difference]: Without dead ends: 399 [2020-10-28 18:58:39,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:58:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-28 18:58:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 266. [2020-10-28 18:58:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-28 18:58:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 394 transitions. [2020-10-28 18:58:39,683 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 394 transitions. Word has length 70 [2020-10-28 18:58:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:39,683 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 394 transitions. [2020-10-28 18:58:39,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:58:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 394 transitions. [2020-10-28 18:58:39,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:58:39,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:39,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:39,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:58:39,686 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:39,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1164471961, now seen corresponding path program 1 times [2020-10-28 18:58:39,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:39,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661469986] [2020-10-28 18:58:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:39,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:40,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:40,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:58:40,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:58:40,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1187 [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:58:40,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:41,247 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:58:41,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:41,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:41,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:41,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:41,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:58:41,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:41,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661469986] [2020-10-28 18:58:41,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:41,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:58:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838446644] [2020-10-28 18:58:41,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:58:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:58:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:41,302 INFO L87 Difference]: Start difference. First operand 266 states and 394 transitions. Second operand 5 states. [2020-10-28 18:58:41,624 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:58:42,406 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:58:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:42,810 INFO L93 Difference]: Finished difference Result 555 states and 845 transitions. [2020-10-28 18:58:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:58:42,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 18:58:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:42,816 INFO L225 Difference]: With dead ends: 555 [2020-10-28 18:58:42,816 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 18:58:42,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:58:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 18:58:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 401. [2020-10-28 18:58:42,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-28 18:58:42,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 605 transitions. [2020-10-28 18:58:42,859 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 605 transitions. Word has length 71 [2020-10-28 18:58:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:42,859 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 605 transitions. [2020-10-28 18:58:42,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:58:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 605 transitions. [2020-10-28 18:58:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:42,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:42,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:42,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:58:42,862 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1907182096, now seen corresponding path program 1 times [2020-10-28 18:58:42,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324037012] [2020-10-28 18:58:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:47,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:47,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:58:47,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:58:47,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:48,160 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:58:48,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:48,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:48,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:48,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:48,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:48,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:48,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324037012] [2020-10-28 18:58:48,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:48,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:48,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597176079] [2020-10-28 18:58:48,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:48,217 INFO L87 Difference]: Start difference. First operand 401 states and 605 transitions. Second operand 4 states. [2020-10-28 18:58:48,479 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:58:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:49,303 INFO L93 Difference]: Finished difference Result 1063 states and 1639 transitions. [2020-10-28 18:58:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:49,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:49,309 INFO L225 Difference]: With dead ends: 1063 [2020-10-28 18:58:49,309 INFO L226 Difference]: Without dead ends: 737 [2020-10-28 18:58:49,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-10-28 18:58:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 734. [2020-10-28 18:58:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-28 18:58:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1116 transitions. [2020-10-28 18:58:49,363 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1116 transitions. Word has length 72 [2020-10-28 18:58:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:49,363 INFO L481 AbstractCegarLoop]: Abstraction has 734 states and 1116 transitions. [2020-10-28 18:58:49,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1116 transitions. [2020-10-28 18:58:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:49,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:49,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:49,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:58:49,367 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1992962962, now seen corresponding path program 1 times [2020-10-28 18:58:49,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:49,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137084663] [2020-10-28 18:58:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:49,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:49,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:54,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:54,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:54,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:58:54,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:54,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:58:54,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:58:54,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:54,686 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:58:54,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:54,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:54,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:58:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:54,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:54,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137084663] [2020-10-28 18:58:54,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:54,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243741155] [2020-10-28 18:58:54,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:54,730 INFO L87 Difference]: Start difference. First operand 734 states and 1116 transitions. Second operand 4 states. [2020-10-28 18:58:54,986 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:58:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:55,746 INFO L93 Difference]: Finished difference Result 1836 states and 2825 transitions. [2020-10-28 18:58:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:55,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:55,755 INFO L225 Difference]: With dead ends: 1836 [2020-10-28 18:58:55,755 INFO L226 Difference]: Without dead ends: 1275 [2020-10-28 18:58:55,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-10-28 18:58:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1272. [2020-10-28 18:58:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-28 18:58:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1927 transitions. [2020-10-28 18:58:55,835 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1927 transitions. Word has length 72 [2020-10-28 18:58:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:55,836 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1927 transitions. [2020-10-28 18:58:55,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1927 transitions. [2020-10-28 18:58:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:55,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:55,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:55,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:58:55,839 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1411326384, now seen corresponding path program 1 times [2020-10-28 18:58:55,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:55,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139720451] [2020-10-28 18:58:55,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:55,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:55,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:56,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:57,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:00,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:00,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:59:00,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:00,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4804 [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:59:00,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:00,990 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:00,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:01,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:01,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:01,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:01,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:01,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139720451] [2020-10-28 18:59:01,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:01,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866276326] [2020-10-28 18:59:01,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:01,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:01,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:01,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:01,050 INFO L87 Difference]: Start difference. First operand 1272 states and 1927 transitions. Second operand 4 states. [2020-10-28 18:59:01,366 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:59:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:02,218 INFO L93 Difference]: Finished difference Result 3346 states and 5089 transitions. [2020-10-28 18:59:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:02,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:59:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:02,232 INFO L225 Difference]: With dead ends: 3346 [2020-10-28 18:59:02,232 INFO L226 Difference]: Without dead ends: 2275 [2020-10-28 18:59:02,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2020-10-28 18:59:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2272. [2020-10-28 18:59:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2272 states. [2020-10-28 18:59:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3397 transitions. [2020-10-28 18:59:02,377 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3397 transitions. Word has length 72 [2020-10-28 18:59:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:02,378 INFO L481 AbstractCegarLoop]: Abstraction has 2272 states and 3397 transitions. [2020-10-28 18:59:02,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3397 transitions. [2020-10-28 18:59:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:59:02,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:02,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:02,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:59:02,385 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1137950766, now seen corresponding path program 1 times [2020-10-28 18:59:02,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:02,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422429172] [2020-10-28 18:59:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:02,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:04,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:06,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4447 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:06,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:59:06,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:59:06,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:07,176 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:07,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:07,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:07,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:07,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:59:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:07,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:07,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422429172] [2020-10-28 18:59:07,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:07,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:07,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646102762] [2020-10-28 18:59:07,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:07,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:07,239 INFO L87 Difference]: Start difference. First operand 2272 states and 3397 transitions. Second operand 4 states. [2020-10-28 18:59:07,587 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:59:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:08,492 INFO L93 Difference]: Finished difference Result 6115 states and 9139 transitions. [2020-10-28 18:59:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:08,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:59:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:08,516 INFO L225 Difference]: With dead ends: 6115 [2020-10-28 18:59:08,516 INFO L226 Difference]: Without dead ends: 4080 [2020-10-28 18:59:08,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2020-10-28 18:59:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 4077. [2020-10-28 18:59:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4077 states. [2020-10-28 18:59:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 5979 transitions. [2020-10-28 18:59:08,764 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 5979 transitions. Word has length 72 [2020-10-28 18:59:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:08,765 INFO L481 AbstractCegarLoop]: Abstraction has 4077 states and 5979 transitions. [2020-10-28 18:59:08,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 5979 transitions. [2020-10-28 18:59:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:59:08,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:08,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:08,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:59:08,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2130654620, now seen corresponding path program 1 times [2020-10-28 18:59:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:08,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566317793] [2020-10-28 18:59:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:08,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:09,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:12,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:12,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:59:12,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:12,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3298 [2020-10-28 18:59:12,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:12,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:12,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:59:12,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:12,482 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:12,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:12,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:12,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:12,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:12,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:12,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:59:12,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:12,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:12,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:12,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:12,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566317793] [2020-10-28 18:59:12,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:12,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:12,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352230581] [2020-10-28 18:59:12,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:12,545 INFO L87 Difference]: Start difference. First operand 4077 states and 5979 transitions. Second operand 8 states. [2020-10-28 18:59:12,842 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 18:59:13,890 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-28 18:59:15,181 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 18:59:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:15,775 INFO L93 Difference]: Finished difference Result 17267 states and 25465 transitions. [2020-10-28 18:59:15,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:15,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:59:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:15,925 INFO L225 Difference]: With dead ends: 17267 [2020-10-28 18:59:15,925 INFO L226 Difference]: Without dead ends: 15644 [2020-10-28 18:59:15,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:59:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2020-10-28 18:59:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 4101. [2020-10-28 18:59:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4101 states. [2020-10-28 18:59:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 6015 transitions. [2020-10-28 18:59:16,361 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 6015 transitions. Word has length 73 [2020-10-28 18:59:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:16,362 INFO L481 AbstractCegarLoop]: Abstraction has 4101 states and 6015 transitions. [2020-10-28 18:59:16,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 6015 transitions. [2020-10-28 18:59:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:59:16,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:16,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:16,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:59:16,366 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:16,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:16,367 INFO L82 PathProgramCache]: Analyzing trace with hash -861211983, now seen corresponding path program 1 times [2020-10-28 18:59:16,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:16,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97175267] [2020-10-28 18:59:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:16,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:17,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:20,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:20,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:59:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3626 [2020-10-28 18:59:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:20,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 18:59:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:20,507 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:20,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:20,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:20,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:20,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:20,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:20,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:20,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97175267] [2020-10-28 18:59:20,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:20,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079663909] [2020-10-28 18:59:20,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:20,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:20,579 INFO L87 Difference]: Start difference. First operand 4101 states and 6015 transitions. Second operand 8 states. [2020-10-28 18:59:20,846 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:59:21,763 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:59:23,276 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:59:23,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:23,903 INFO L93 Difference]: Finished difference Result 23868 states and 35059 transitions. [2020-10-28 18:59:23,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:23,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:59:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:23,952 INFO L225 Difference]: With dead ends: 23868 [2020-10-28 18:59:23,952 INFO L226 Difference]: Without dead ends: 20444 [2020-10-28 18:59:23,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20444 states. [2020-10-28 18:59:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20444 to 4317. [2020-10-28 18:59:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4317 states. [2020-10-28 18:59:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 6223 transitions. [2020-10-28 18:59:24,677 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 6223 transitions. Word has length 73 [2020-10-28 18:59:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:24,677 INFO L481 AbstractCegarLoop]: Abstraction has 4317 states and 6223 transitions. [2020-10-28 18:59:24,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 6223 transitions. [2020-10-28 18:59:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:59:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:24,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:24,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:59:24,682 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2034260542, now seen corresponding path program 1 times [2020-10-28 18:59:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:24,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856127361] [2020-10-28 18:59:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:24,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:24,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:25,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2745 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:27,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 18:59:27,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:27,893 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:27,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:27,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:27,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:27,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:27,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:59:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:27,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856127361] [2020-10-28 18:59:27,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:27,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:27,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866527330] [2020-10-28 18:59:27,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:27,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:27,964 INFO L87 Difference]: Start difference. First operand 4317 states and 6223 transitions. Second operand 8 states. [2020-10-28 18:59:28,242 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:59:29,255 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 18:59:30,628 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:59:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:31,302 INFO L93 Difference]: Finished difference Result 20842 states and 30059 transitions. [2020-10-28 18:59:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:31,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:59:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:31,344 INFO L225 Difference]: With dead ends: 20842 [2020-10-28 18:59:31,344 INFO L226 Difference]: Without dead ends: 17484 [2020-10-28 18:59:31,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17484 states. [2020-10-28 18:59:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17484 to 4697. [2020-10-28 18:59:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2020-10-28 18:59:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 6649 transitions. [2020-10-28 18:59:32,017 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 6649 transitions. Word has length 73 [2020-10-28 18:59:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:32,017 INFO L481 AbstractCegarLoop]: Abstraction has 4697 states and 6649 transitions. [2020-10-28 18:59:32,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 6649 transitions. [2020-10-28 18:59:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:32,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:32,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:32,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:59:32,023 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash -880356020, now seen corresponding path program 1 times [2020-10-28 18:59:32,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:32,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914127077] [2020-10-28 18:59:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:32,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:34,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:34,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:34,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:34,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2731 [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:59:34,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:35,108 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:35,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:35,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:35,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:35,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:35,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:35,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:59:35,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:35,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:35,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:35,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:35,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914127077] [2020-10-28 18:59:35,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:35,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814988055] [2020-10-28 18:59:35,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:35,151 INFO L87 Difference]: Start difference. First operand 4697 states and 6649 transitions. Second operand 8 states. [2020-10-28 18:59:35,448 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:59:36,481 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:59:37,836 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:59:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:38,546 INFO L93 Difference]: Finished difference Result 17287 states and 24390 transitions. [2020-10-28 18:59:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:38,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-28 18:59:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:38,579 INFO L225 Difference]: With dead ends: 17287 [2020-10-28 18:59:38,580 INFO L226 Difference]: Without dead ends: 15539 [2020-10-28 18:59:38,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:59:38,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15539 states. [2020-10-28 18:59:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15539 to 4787. [2020-10-28 18:59:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4787 states. [2020-10-28 18:59:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 6766 transitions. [2020-10-28 18:59:39,316 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 6766 transitions. Word has length 74 [2020-10-28 18:59:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:39,316 INFO L481 AbstractCegarLoop]: Abstraction has 4787 states and 6766 transitions. [2020-10-28 18:59:39,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:39,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 6766 transitions. [2020-10-28 18:59:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:39,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:39,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:39,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:59:39,322 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:39,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:39,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1570260385, now seen corresponding path program 1 times [2020-10-28 18:59:39,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:39,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669599468] [2020-10-28 18:59:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:39,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:39,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:39,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:39,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:39,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:39,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:40,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:41,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:44,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:44,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:59:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:59:44,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:44,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:59:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:59:44,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:59:44,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:44,645 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:44,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:44,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:44,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:44,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669599468] [2020-10-28 18:59:44,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:44,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:44,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110331074] [2020-10-28 18:59:44,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:59:44,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:44,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:59:44,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:59:44,679 INFO L87 Difference]: Start difference. First operand 4787 states and 6766 transitions. Second operand 7 states. [2020-10-28 18:59:44,968 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:59:45,817 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:59:46,109 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:59:47,645 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:59:47,969 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:59:48,240 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:48,430 INFO L93 Difference]: Finished difference Result 16805 states and 24078 transitions. [2020-10-28 18:59:48,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:59:48,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 18:59:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:48,447 INFO L225 Difference]: With dead ends: 16805 [2020-10-28 18:59:48,448 INFO L226 Difference]: Without dead ends: 13490 [2020-10-28 18:59:48,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:48,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2020-10-28 18:59:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 5632. [2020-10-28 18:59:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5632 states. [2020-10-28 18:59:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5632 states to 5632 states and 7994 transitions. [2020-10-28 18:59:49,215 INFO L78 Accepts]: Start accepts. Automaton has 5632 states and 7994 transitions. Word has length 74 [2020-10-28 18:59:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:49,215 INFO L481 AbstractCegarLoop]: Abstraction has 5632 states and 7994 transitions. [2020-10-28 18:59:49,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:59:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5632 states and 7994 transitions. [2020-10-28 18:59:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:49,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:49,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:49,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:59:49,221 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:49,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:49,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2134384001, now seen corresponding path program 1 times [2020-10-28 18:59:49,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:49,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589568541] [2020-10-28 18:59:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:54,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:59:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:59:54,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:59:54,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:54,536 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:54,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:54,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:54,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:54,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:54,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:59:54,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:54,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:54,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:54,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:54,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:54,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:54,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589568541] [2020-10-28 18:59:54,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:54,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:54,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205495710] [2020-10-28 18:59:54,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:59:54,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:54,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:59:54,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:59:54,572 INFO L87 Difference]: Start difference. First operand 5632 states and 7994 transitions. Second operand 7 states. [2020-10-28 18:59:54,923 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 18:59:55,769 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 18:59:56,140 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 18:59:57,829 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:59:58,105 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 18:59:58,385 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:58,649 INFO L93 Difference]: Finished difference Result 18585 states and 26634 transitions. [2020-10-28 18:59:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:59:58,649 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 18:59:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:58,664 INFO L225 Difference]: With dead ends: 18585 [2020-10-28 18:59:58,664 INFO L226 Difference]: Without dead ends: 15270 [2020-10-28 18:59:58,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15270 states. [2020-10-28 18:59:59,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15270 to 6951. [2020-10-28 18:59:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6951 states. [2020-10-28 18:59:59,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6951 states to 6951 states and 9923 transitions. [2020-10-28 18:59:59,885 INFO L78 Accepts]: Start accepts. Automaton has 6951 states and 9923 transitions. Word has length 74 [2020-10-28 18:59:59,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:59,885 INFO L481 AbstractCegarLoop]: Abstraction has 6951 states and 9923 transitions. [2020-10-28 18:59:59,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:59:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6951 states and 9923 transitions. [2020-10-28 18:59:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 18:59:59,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:59,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:59,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:59:59,891 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:59,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1649977000, now seen corresponding path program 1 times [2020-10-28 18:59:59,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:59,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83946220] [2020-10-28 18:59:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:59,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:02,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:04,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:04,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 19:00:04,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:05,197 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:00:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:05,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:05,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83946220] [2020-10-28 19:00:05,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:05,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:05,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044823830] [2020-10-28 19:00:05,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:05,224 INFO L87 Difference]: Start difference. First operand 6951 states and 9923 transitions. Second operand 7 states. [2020-10-28 19:00:05,532 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:00:06,473 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:00:06,812 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:00:08,797 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 19:00:09,077 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 19:00:09,374 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:09,714 INFO L93 Difference]: Finished difference Result 20355 states and 29176 transitions. [2020-10-28 19:00:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:00:09,715 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-28 19:00:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:09,735 INFO L225 Difference]: With dead ends: 20355 [2020-10-28 19:00:09,735 INFO L226 Difference]: Without dead ends: 17040 [2020-10-28 19:00:09,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17040 states. [2020-10-28 19:00:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17040 to 8286. [2020-10-28 19:00:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8286 states. [2020-10-28 19:00:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 11863 transitions. [2020-10-28 19:00:10,971 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 11863 transitions. Word has length 75 [2020-10-28 19:00:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:10,971 INFO L481 AbstractCegarLoop]: Abstraction has 8286 states and 11863 transitions. [2020-10-28 19:00:10,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:00:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 11863 transitions. [2020-10-28 19:00:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:00:10,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:10,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:10,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:00:10,976 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:10,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1660590212, now seen corresponding path program 1 times [2020-10-28 19:00:10,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:10,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200821871] [2020-10-28 19:00:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:16,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:00:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 19:00:16,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:00:16,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:16,330 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:00:16,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:16,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:16,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:16,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200821871] [2020-10-28 19:00:16,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:16,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:16,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898686313] [2020-10-28 19:00:16,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:16,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:16,359 INFO L87 Difference]: Start difference. First operand 8286 states and 11863 transitions. Second operand 7 states. [2020-10-28 19:00:16,673 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:00:17,641 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:00:17,951 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 19:00:20,377 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:20,645 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 19:00:20,929 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 19:00:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:21,424 INFO L93 Difference]: Finished difference Result 21840 states and 31301 transitions. [2020-10-28 19:00:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:00:21,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-28 19:00:21,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:21,448 INFO L225 Difference]: With dead ends: 21840 [2020-10-28 19:00:21,448 INFO L226 Difference]: Without dead ends: 18525 [2020-10-28 19:00:21,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18525 states. [2020-10-28 19:00:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18525 to 9559. [2020-10-28 19:00:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9559 states. [2020-10-28 19:00:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9559 states to 9559 states and 13701 transitions. [2020-10-28 19:00:22,893 INFO L78 Accepts]: Start accepts. Automaton has 9559 states and 13701 transitions. Word has length 75 [2020-10-28 19:00:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:22,893 INFO L481 AbstractCegarLoop]: Abstraction has 9559 states and 13701 transitions. [2020-10-28 19:00:22,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:00:22,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9559 states and 13701 transitions. [2020-10-28 19:00:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:00:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:22,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:22,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:00:22,898 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2017509426, now seen corresponding path program 1 times [2020-10-28 19:00:22,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:22,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638293207] [2020-10-28 19:00:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:22,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:27,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:27,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:00:27,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:00:27,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:00:27,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:27,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:27,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:00:27,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:28,223 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:00:28,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:28,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:28,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:28,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:28,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:00:28,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:28,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:28,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:28,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:28,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638293207] [2020-10-28 19:00:28,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:28,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041711190] [2020-10-28 19:00:28,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:28,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:28,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:28,263 INFO L87 Difference]: Start difference. First operand 9559 states and 13701 transitions. Second operand 6 states. [2020-10-28 19:00:28,563 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 19:00:29,651 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 19:00:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:31,983 INFO L93 Difference]: Finished difference Result 26623 states and 38200 transitions. [2020-10-28 19:00:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:00:31,984 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 19:00:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:32,001 INFO L225 Difference]: With dead ends: 26623 [2020-10-28 19:00:32,001 INFO L226 Difference]: Without dead ends: 17415 [2020-10-28 19:00:32,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:00:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17415 states. [2020-10-28 19:00:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17415 to 17348. [2020-10-28 19:00:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17348 states. [2020-10-28 19:00:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17348 states to 17348 states and 24731 transitions. [2020-10-28 19:00:34,608 INFO L78 Accepts]: Start accepts. Automaton has 17348 states and 24731 transitions. Word has length 78 [2020-10-28 19:00:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:34,608 INFO L481 AbstractCegarLoop]: Abstraction has 17348 states and 24731 transitions. [2020-10-28 19:00:34,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 17348 states and 24731 transitions. [2020-10-28 19:00:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:00:34,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:34,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:34,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:00:34,613 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2111228608, now seen corresponding path program 1 times [2020-10-28 19:00:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:34,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393610050] [2020-10-28 19:00:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:34,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:00:39,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 19:00:39,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:39,906 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:00:39,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:39,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:39,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:39,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:39,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:39,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:39,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393610050] [2020-10-28 19:00:39,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:39,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:00:39,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978379850] [2020-10-28 19:00:39,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:39,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:39,931 INFO L87 Difference]: Start difference. First operand 17348 states and 24731 transitions. Second operand 6 states. [2020-10-28 19:00:40,202 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:42,578 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:00:43,021 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:01:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:01,669 INFO L93 Difference]: Finished difference Result 142457 states and 204964 transitions. [2020-10-28 19:01:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:01:01,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 19:01:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:01,862 INFO L225 Difference]: With dead ends: 142457 [2020-10-28 19:01:01,862 INFO L226 Difference]: Without dead ends: 126053 [2020-10-28 19:01:01,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:01:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126053 states. [2020-10-28 19:01:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126053 to 63884. [2020-10-28 19:01:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63884 states. [2020-10-28 19:01:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63884 states to 63884 states and 91528 transitions. [2020-10-28 19:01:12,306 INFO L78 Accepts]: Start accepts. Automaton has 63884 states and 91528 transitions. Word has length 79 [2020-10-28 19:01:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:12,307 INFO L481 AbstractCegarLoop]: Abstraction has 63884 states and 91528 transitions. [2020-10-28 19:01:12,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 63884 states and 91528 transitions. [2020-10-28 19:01:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:01:12,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:12,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:12,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:01:12,318 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:12,318 INFO L82 PathProgramCache]: Analyzing trace with hash 641529387, now seen corresponding path program 1 times [2020-10-28 19:01:12,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:12,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932337110] [2020-10-28 19:01:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:12,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:14,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:17,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:01:17,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:01:17,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:01:17,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:17,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 19:01:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:17,625 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:01:17,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:17,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:17,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:17,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:17,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932337110] [2020-10-28 19:01:17,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:17,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:01:17,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20687809] [2020-10-28 19:01:17,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:17,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:17,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:17,659 INFO L87 Difference]: Start difference. First operand 63884 states and 91528 transitions. Second operand 6 states. [2020-10-28 19:01:17,956 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 19:01:20,394 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 19:01:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:38,666 INFO L93 Difference]: Finished difference Result 186511 states and 268564 transitions. [2020-10-28 19:01:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:01:38,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 19:01:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:39,020 INFO L225 Difference]: With dead ends: 186511 [2020-10-28 19:01:39,021 INFO L226 Difference]: Without dead ends: 123348 [2020-10-28 19:01:39,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123348 states. [2020-10-28 19:01:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123348 to 122833. [2020-10-28 19:01:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122833 states. [2020-10-28 19:01:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122833 states to 122833 states and 176204 transitions. [2020-10-28 19:01:58,738 INFO L78 Accepts]: Start accepts. Automaton has 122833 states and 176204 transitions. Word has length 79 [2020-10-28 19:01:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:58,738 INFO L481 AbstractCegarLoop]: Abstraction has 122833 states and 176204 transitions. [2020-10-28 19:01:58,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:58,739 INFO L276 IsEmpty]: Start isEmpty. Operand 122833 states and 176204 transitions. [2020-10-28 19:01:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:01:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:58,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:58,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:01:58,751 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1733051117, now seen corresponding path program 1 times [2020-10-28 19:01:58,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:58,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880710923] [2020-10-28 19:01:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:59,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:00,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:01,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking...